Optics Question 128

Question: A double convex lens, lens made of a material of refractive index $ {\mu _{1}} $ , is placed inside two liquids or refractive indices $ {\mu _{2}} $ and $ {\mu _{3}} $ , as shown. $ {\mu _{2}}>{\mu _{1}}>{\mu _{3}} $ . A wide, parallel beam of light is incident on the lens from the left. The lens will give rise to

Options:

A) A single convergent beam

B) Two different convergent beams

C) Two different divergent beams

D) A convergent and a divergent beam

Show Answer

Answer:

Correct Answer: D

Solution:

As $ {\mu _{2}}>{\mu _{1}}, $ the upper half of the lens will become diverging. As $ {\mu _{1}}>{\mu _{3}}, $ the lower half of the lens will become converging



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